Php Android Java jSON UTF-8 httpResponse问题

我对utf-8中的德语字符有问题。我使用一个MySQL数据库，通过PHP从中获取数据。php脚本将数据转换为json对象并将其发送到应用程序。数据库包含双精度和字符串。首先，应用程序发送一个带有主题名称的字符串。php在db中搜索主题，将内容转换为json并发送给应用程序

我试图发送不带“ä，ü，ö”等字符的数据，结果成功了。当我使用这个德语字符时，它会停在线上

HttpResponse response =httpClient.execute(httppost);

我不知道为什么，我做错了什么。 这是我的申请代码：

public void getData(String data){
        String topic = data; //Parameter for PHP
        String result = "";
        InputStream isr = null;
        ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); //PHP
        nameValuePairs.add(new BasicNameValuePair("topic", topic)); //PHP

        try{
            DefaultHttpClient httpClient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("http://192.168.179.20:80/PHP/getData.php");  //PHP-Script on localhost
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); //PHP
            HttpResponse response = httpClient.execute(httppost);
            HttpEntity entity = response.getEntity();
            isr = entity.getContent();

    } 
    catch(Exception e){
            Log.e("log_tag", "Error in http connection "+e.toString());
            resultView.setText("Could not connect to database");
    }
    //convert response to string
    try{
            BufferedReader reader = new BufferedReader(new InputStreamReader(isr,"iso-8859-1"),8);
            StringBuilder sb = new StringBuilder();

            String line = null;
            while ((line = reader.readLine()) != null) {
                    sb.append(line + "\n");
            }
            isr.close();

            result=sb.toString();
    }
    catch(Exception e){
            Log.e("log_tag", "Error  converting result "+e.toString());
    }


   try {
       String s = "";
       JSONArray jArray = new JSONArray(result);

       for(int i=0; i<jArray.length();i++){
           JSONObject json = jArray.getJSONObject(i);



           double Lat = json.getDouble("Latitude");
           double Lng = json.getDouble("Longitude");
           String Title = new String(json.getString("Ueberschrift").getBytes("ISO-8859-1"),"UTF-8");
           String ShortText = new String(json.getString("Kurzbeschreibung").getBytes("ISO-8859-1"),"UTF-8");
           String LongText = new String(json.getString("Inhalt").getBytes("ISO-8859-1"),"UTF-8");
           String Thema = new String(json.getString("Thema").getBytes("ISO-8859-1"),"UTF-8");
           String Datum = json.getString("Date");
           String Url = new String(json.getString("Url").getBytes("ISO-8859-1"),"UTF-8");

           s = s +
                   "Latitude: "+Lat+", "+"Longitude: "+Lng+"\n"+
                   "Thema: "+Thema+"\n"+
                   "Titel: "+Title+"\n"+
                   "Kurzbezeichnung: "+ShortText+"\n"+
                   "Inhalt: "+LongText+"\n\n";


       }


       resultView.setText(s);

   } catch (Exception e) {
    // TODO: handle exception
       Log.e("log_tag", "Error Parsing Data "+e.toString());
   }

    }

json如下所示：

[{"id":"5","Longitude":"11.0730833333333","Latitude":"49.4530833333333","Height":"10","Ueberschrift":"Henkersteg","Kurzbeschreibung":"Der Henkersteg, auch","Inhalt":"Stadtbefestigung\u00a0| Marthakirch","Thema":"D\u00fcrer","Thema_id":"3","Datetime":"15\/02\/2015","Url":"http:\/\/de.wikipedia.org\/wiki\/Henkersteg"}]JSON Error: 0

提前感谢您的帮助。

我换了线路

 httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

到

---

我还更改了数据库的设置。更改后，我可以在应用程序中显示我的字符串，但不幸的是，我得到的是“？”而不是“ü”

因此，您在发布这些字符时遇到问题。从更改php脚本开始。不要对数据库执行任何操作。相反，只需回显接收到的数据。。测试您是否首先返回这些字符。也不要用php进行json编码。不要让它转到“unicode”，例如

\u00a0

。您可能需要utf8。字符串的其余部分是否在“？”之后丢失？（这可能是一条重要线索。）不，只有字符显示为“？”。字符串的其余部分打印正确。（例如：D？rer而不是Dürer）

 httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

 httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, HTTP.UTF_8));